i bet any money with a tuner the 6.4 will make more power than the Duramax will ever even dream of making. I figure Ford is keeping the hp and tq numbers low right now to see how good the reliability of the motor is . 1 or 2 years go by and everything is good to go you might see another 25-50hp from the factory out of the 6.4.
Last edited by 99gt : 02-26-2007 at 02:13 PM.